<script setup lang="ts">
import { useElementSize } from "@vueuse/core";
import Tabbar from "./Tabbar/index.vue";
import Toolbar from "./Toolbar/index.vue";

defineOptions({
  name: "Topbar",
});

const settingsStore = useSettingsStore();

const enableToolbar = computed(() => {
  return (
    settingsStore.settings.toolbar.enable &&
    Object.keys(settingsStore.settings.toolbar).some((key) => {
      if (
        settingsStore.settings.app.routeBaseOn === "filesystem" &&
        key === "breadcrumb"
      ) {
        return false;
      }
      return settingsStore.settings.toolbar[
        key as keyof typeof settingsStore.settings.toolbar
      ];
    })
  );
});

const scrollTop = ref(0);
const scrollOnHide = ref(false);

const topbarRef = useTemplateRef("topbarRef");
const { height: topbarHeight } = useElementSize(topbarRef);

onMounted(() => {
  window.addEventListener("scroll", onScroll);
});
onUnmounted(() => {
  window.removeEventListener("scroll", onScroll);
});
function onScroll() {
  scrollTop.value = (document.documentElement || document.body).scrollTop;
}
watch(scrollTop, (val, oldVal) => {
  scrollOnHide.value =
    settingsStore.settings.topbar.mode === "sticky" &&
    val > oldVal &&
    val > topbarHeight.value;
});
</script>

<template>
  <FaSmartFixedBlock
    position="top"
    :class="{ 'absolute!': settingsStore.settings.topbar.mode === 'static' }"
  >
    <div
      ref="topbarRef"
      class="topbar-container transition-[transform,box-shadow]-300"
      :class="{
        [`topbar-${settingsStore.settings.topbar.mode}`]: true,
        mask: scrollTop,
        hide: scrollOnHide,
      }"
    >
      <Tabbar v-if="settingsStore.settings.tabbar.enable" />
      <Toolbar v-if="enableToolbar" />
    </div>
  </FaSmartFixedBlock>
</template>

<style scoped>
.topbar-container {
  display: flex;
  flex-direction: column;
  width: calc(100% - var(--scrollbar-width, 0px));
  box-shadow: 0 1px 0 0 hsl(var(--border));
  transition:
    transform 0.3s,
    box-shadow 0.3s;

  &::before {
    position: absolute;
    bottom: 0;
    left: 0;
    z-index: 1;
    width: 100%;
    height: 50px;
    pointer-events: none;
    content: "";
    background-image: linear-gradient(0deg, transparent, var(--g-main-area-bg));
    box-shadow: 0 -1px 0 0 hsl(var(--border));
    opacity: 0;
    transform: translateY(100%);
    transition: opacity 0.3s;
  }

  &.topbar-fixed,
  &.topbar-sticky {
    position: fixed;

    &.mask::before {
      opacity: 1;
    }
  }

  &.topbar-sticky.hide {
    transform: translateY(-100%);
  }
}
</style>
